“I do think the U.S. is starting to withdraw from the position that it played for much of the 20th century, as did the U.K. for much of the 19th, in enforcing international rules,” said John Yoo, who worked in the Office of Legal Counsel during the George W. Bush administration and is now at the University of California, Berkeley School of Law. Such enforcement “is costly, but it brings great benefits to everyone in the world,” Yoo added. “I think the American people are exhausted from it.”